I sent this once already but it didnt show up in my mailbox so I am not sure if
ever made it to the list. If it did, my apologies.
I have an * system and an nbx. My plan is to use several grandstream 286s and
plug the the phone cords into the NBX's analog FXO card. It works fine but
after I make a call, the port stays open on the NBX and I cannot make another
call for around five minutes or I have to manually reset the port on the NBX.
I assume the Grandstream is still sending a busy signal to the NBX so the port
wont close. I know you can do things with Zap channels to monitor the line but
is it possible with SIP? I am pretty sure that this needs to be implemented on
the 286 or the NBX itself and not *. Here is what 3com says about it. Maybe
someone can help without having to buy the graybar device listed in the article.
SOLUTION OFFERING FOR Telco LINES NOT PROVIDING DISCONNECT:
- This solution may not work in all implementations, and most likely does
NOT work for PBX Analog Extensions coming into the NBX, as they are not actual
phone company lines, they do not go into recordings or produce re-order tones
- This solution is a workaround to be attempted, with the explicit
understanding that 3Com Corporation does NOT endorse this product in any way,
but prefers to provide a solution for
continued use of the NBX system:
The disconnect product is available through GrayBar (800 825 5517).Please
shop around and get the unit you feel may be best for your situation.
Product Manufacturer: Electronic Tele-Communications, Inc.
Model: MAX Terminator Disconnect Unit
"Scans for progress tones - dial tone, reorder tone, busy signal -
and generates a disconnect signal within seconds of recognizing the tone. The
disconnect signal is passed down the line to the peripheral equipment, allowing
proper operation. Prevents voice mail systems from recording annoying telephone
tones after a caller hangs up. Also helps alleviate tied up phone lines.
- Provides disconnect detection for phone systems and peripherals
- Helps maintain accurate call count statistics
- Services 12 lines; up to 120 lines with rack-mount unit
- Progress tone scanner
- Stand alone chassis
- Rack-mounted cards (card file accommodates up to 10 cards)
- Easy installation"
GrayBar Catalog # and Description (GrayBar 800 825 5517 for pricing and
availability - ask for similar products too)
ETC - 8208 - SN12 Standard Chassis Unit (12 lines) 11.2 " long x
8.5" wide x 1.5" deep or rack mount for more lines:
ETC - 1144 - CN12 - Rack Card (12 lines per card)
ETC - 1145 - AC - Rack Card File - accommodates up to 120 lines
(10 cards)
this thing costs over a grand!
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